JPS6443084A - Servo abnormality detection - Google Patents

Servo abnormality detection

Info

Publication number
JPS6443084A
JPS6443084A JP62198094A JP19809487A JPS6443084A JP S6443084 A JPS6443084 A JP S6443084A JP 62198094 A JP62198094 A JP 62198094A JP 19809487 A JP19809487 A JP 19809487A JP S6443084 A JPS6443084 A JP S6443084A
Authority
JP
Japan
Prior art keywords
command
current
motor
servo
compares
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62198094A
Other languages
Japanese (ja)
Inventor
Azusa Nishida
Tatsuya Seshimo
Kyoichi Kawasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Hitachi KE Systems Ltd
Original Assignee
Hitachi Ltd
Hitachi Keiyo Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Keiyo Engineering Co Ltd filed Critical Hitachi Ltd
Priority to JP62198094A priority Critical patent/JPS6443084A/en
Publication of JPS6443084A publication Critical patent/JPS6443084A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Electric Motors In General (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

PURPOSE:To allow a motor to detect servo abnormality for sure, by comparing the sign of positional deviation with the rotating direction of motor in every sampling time and by judging it as servo-abnormal when both of them above are different in more than designated number of sampling attempts. CONSTITUTION:A position command section 100 compares a position command with a position feedback signal and outputs a speed command. A speed control 102 compares a speed command with a speed feedback signal and outputs a current command. A current control circuit 103 compares a current command with a current feedback signal and controls the current of a motor 105. On the other hand, the sign of positional deviation is compared with the rotating direction of the motor in every sampling step. If both of them are continuously different in more than designated number of sampling attempts, it is judged as servo-abnormal. In this way, the servo abnormality can be surely detected.
JP62198094A 1987-08-10 1987-08-10 Servo abnormality detection Pending JPS6443084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62198094A JPS6443084A (en) 1987-08-10 1987-08-10 Servo abnormality detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62198094A JPS6443084A (en) 1987-08-10 1987-08-10 Servo abnormality detection

Publications (1)

Publication Number Publication Date
JPS6443084A true JPS6443084A (en) 1989-02-15

Family

ID=16385399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62198094A Pending JPS6443084A (en) 1987-08-10 1987-08-10 Servo abnormality detection

Country Status (1)

Country Link
JP (1) JPS6443084A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03230783A (en) * 1990-02-05 1991-10-14 Kitazawa Valve:Kk Abnormal state detecting mechanism for stop position for electrically-driven actuator
JPH03235686A (en) * 1990-02-09 1991-10-21 Matsushita Electric Ind Co Ltd Motor controller
JPH0522977A (en) * 1991-07-12 1993-01-29 Yaskawa Electric Corp Servo motor runaway detection / prevention method
WO1996033549A1 (en) * 1995-04-19 1996-10-24 Fanuc Ltd Method and apparatus for detecting runaway of motor
JP2010172117A (en) * 2009-01-23 2010-08-05 Sanyo Electric Co Ltd Motor speed controller
CN111211712A (en) * 2020-01-14 2020-05-29 之江实验室 Unmanned aerial vehicle motor driving system and motor fault-tolerant control method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03230783A (en) * 1990-02-05 1991-10-14 Kitazawa Valve:Kk Abnormal state detecting mechanism for stop position for electrically-driven actuator
JPH03235686A (en) * 1990-02-09 1991-10-21 Matsushita Electric Ind Co Ltd Motor controller
JPH0522977A (en) * 1991-07-12 1993-01-29 Yaskawa Electric Corp Servo motor runaway detection / prevention method
WO1996033549A1 (en) * 1995-04-19 1996-10-24 Fanuc Ltd Method and apparatus for detecting runaway of motor
JPH08294295A (en) * 1995-04-19 1996-11-05 Fanuc Ltd Detection of uncontrolled rotation of motor and uncontrolled rotation detecting apparatus
US5767646A (en) * 1995-04-19 1998-06-16 Fanuc Ltd. Method of and apparatus for detecting anomalous running of motor
JP2010172117A (en) * 2009-01-23 2010-08-05 Sanyo Electric Co Ltd Motor speed controller
CN111211712A (en) * 2020-01-14 2020-05-29 之江实验室 Unmanned aerial vehicle motor driving system and motor fault-tolerant control method

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